Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR RELATED DTCS
1. With the scan tool, read DTCs.
2. If any of these DTCs are present, perform their respective tests first.
  Are any Transmission solenoid, line pressure, speed sensor and/or loss of prime DTCs present?
  
  Yes
  - If any of these DTCs are present, they may cause a Speed Ratio Error. Perform test for P0944 first if it is present. Refer to DIAGNOSIS AND TESTING and perform the appropriate diagnostic procedure .
  No
  - Go To 2
CHECK THE L/R CLUTCH STATE
1. Start the vehicle, with the brakes firmly applied and the vehicle stationary, place the shift lever in Drive. Using the scan tool, check the L/R Clutch State.
  Did the L/R Clutch state read Applied?
  
  Yes
  - Go To 4
  No
  - Go To 3
CHECK THE POWERTRAIN CONTROL MODULE
1. Turn the ignition off for at least 30 seconds.
2. Start the vehicle, with the brakes firmly applied and the vehicle stationary, place the shift lever in Drive. Using the scan tool, check the L/R Clutch State.
  Did the L/R Clutch state read Applied?
  
  Yes
  - Go To 4
  No
  - Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the PCM in accordance with the Service Information. With the scan tool, perform a Quick Learn.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK FOR SLIPPAGE IN 1ST GEAR
1. With the scan tool, perform the 1st Gear Clutch Test. Follow the instructions on the scan tool.
2. Increase the throttle angle or TPS Degree to 30° for no more than a few seconds.
  CAUTION:
  Do not overheat the transmission.
  
  Did the Clutch Test pass, Input Speed remain at zero?
  
  Yes
  - Go To 6
  No
  - Go To 5
CHECK THE OVERRUNNING CLUTCH
1. With the scan tool, monitor the L/R Clutch state while launching the vehicle from a stop in 1st gear.
  Does the transmission slip (neutral out) when the L/R Clutch state changes to Not Applied?
  
  Yes
  - Remove transmission and inspect for failed overrunning clutch (rotates in both directions). Refer to the Service Information for proper repair procedures.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 7
CHECK FOR INTERMITTENT OPERATION
1. The conditions to set this DTC are not currently present.
2. With the scan tool, check the Event Data to help identify the conditions in which the DTC set.
  - If the Event Data shows DTC P0731 was set in Park, Reverse or Neutral, replace the Powertrain Control Module.
  - If the Event Data shows DTC P0731 set with input rpm = zero, check the input speed sensor and related wiring.
  - If the Event Data shows DTC P0731 set with line pressure significantly below desired line pressure, check for the cause of low line pressure (i.e. oil level, mis-installed or damaged primary filter or filter seal, sticking main regulator valve in pump, etc.).
  - If the Event Data shows DTC P0731 set with the UD pressure switch open (but line pressure matches Desired Line Pressure), air check the UD hydraulic clutch circuit for leakage in accordance with the Service Information. If the UD hydraulic clutch circuit is OK, replace the solenoid/TRS assembly.
3. Check the gearshift linkage adjustment.
4. Intermittent Gear Ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed Sensor Ground circuit.
5. Remove the Starter Relay from the PDC.
  CAUTION:
  Removal of the Starter Relay will prevent the vehicle from being started in gear.
  
  WARNING:
  The Starter Relay must be removed from the PDC. Failure to do so may result in possible serious or fatal injury.
6. Install the Transmission Simulator (special tool #8333B, Simulator, Transmission).
7. Wiggle wiring and connectors while checking for intermittent operation with the Transmission Simulator.
8. Gear ratio DTCs can also be set under extreme temperature conditions.
9. Verify if the problem is only experienced under extreme hot or cold conditions.
  Were any problems found.
  
  Yes
  - Repair as necessary.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.
CHECK INTERNAL TRANSMISSION
1. Repair internal transmission as necessary. Refer to the Service Information.
2. If there were any line pressure DTCs present along with this DTC, make sure to inspect the: Primary oil filter and seal, Transmission Oil Pump and the Main regulator valve in accordance with the Service Information.
3. If DTCs P0876 and/or P0875 were present in addition to P0731, replace the Transmission Solenoid/TRS Assembly in addition to necessary internal repairs.
4. Pay particular attention to the following list of possible causes when repairing the transmission:
  - Cut UD piston seal
  - Failed overrunning clutch
  - Burned UD clutch
  - Cut UD accumulator seal ring
  - Broken UD accumulator piston
  - Low line pressure
  - Broken/missing main valve body bleed orifice
  - Broken/missing dribbler orifice assembly in reaction shaft support
  - Poor machining on pump valve body face
  - Transmission Solenoid/TRS Assembly
  Repair
  - Repair internal transmission in accordance with the Service Information.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .